Hi,
I'm working on a custom security system for an older vehicle. I have an off-the-shelf GPS tracker that would normally be connected to the car's battery. The unit has no battery backup. It normally takes a straight 12 volt supply. I'd like to have a battery backup for this thing in case something happens with the electrical supply (it's an old mechanically fuelled Diesel engine and can run without a battery).
My first thought was to use something like an A23 battery, but those are non-rechargeable. A small lithium pack with a boost/buck converter and charging module was another idea, but I'd be a bit worried about the safety of that sort of set up (and the compactness).
The GPS tracker doesn't use a lot of current, and I can't foresee it needing to run for a long time without its external source - so capacity isn't a big concern. The battery would, however, need to last a long time while being topped up by the car's own power system - 99.9% of the time it would have a power supply.
So:
Small, rechargeable, reliable battery. Can you think of any good options for this?
I'm working on a custom security system for an older vehicle. I have an off-the-shelf GPS tracker that would normally be connected to the car's battery. The unit has no battery backup. It normally takes a straight 12 volt supply. I'd like to have a battery backup for this thing in case something happens with the electrical supply (it's an old mechanically fuelled Diesel engine and can run without a battery).
My first thought was to use something like an A23 battery, but those are non-rechargeable. A small lithium pack with a boost/buck converter and charging module was another idea, but I'd be a bit worried about the safety of that sort of set up (and the compactness).
The GPS tracker doesn't use a lot of current, and I can't foresee it needing to run for a long time without its external source - so capacity isn't a big concern. The battery would, however, need to last a long time while being topped up by the car's own power system - 99.9% of the time it would have a power supply.
So:
Small, rechargeable, reliable battery. Can you think of any good options for this?